When a stent is placed, the thrombus or plaque is between the stent wall and blood vessel wall. So, the plaques cannot access the blood vessel or stent lumen. Also, some stents have drugs in them which are slowly released, which do not allow further clot formation. Other medications are given by mouth called blood thinners. However yes, when the thrombus is pushed by the balloon end catheter before inserting the stent, a thrombus can break and circulate in blood vessel. This thrombus can cause strokes if it blocks a blood vessel in brain. Hope this helps. Take care!
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